Comment 4 for bug 1825146

Just for reference:

Without the above ovn config, octavia api fails to strat with below error.

2019-04-18 07:25:32.806 20 DEBUG octavia.api.app [-] ovn _init_drivers /usr/lib/python2.7/site-packages/octavia/api/app.py:43
2019-04-18 07:25:32.807 20 ERROR ovsdbapp.backend.ovs_idl.idlutils [-] Unable to open stream to tcp:127.0.0.1:6641 to retrieve schema: Connection refused
2019-04-18 07:25:32.807 20 ERROR octavia.api.drivers.driver_factory [-] Unable to load provider driver ovn due to: Could not retrieve schema from tcp:127.0.0.1:6641: Exception: Could not retrieve schema from tcp:127.0.0.1:6641